When the Bluetooth headset is always connected to someone else's phone, it means that the headset may have been remembered by other devices, or there may be some configuration issues during the connection process. Here are some steps to solve this problem:
Disconnect on someone else's phone: First, on those phones that have already been paired with the headphones, go to the Bluetooth settings, find the name of your headphones and select "Disconnect" or "Unpair".
Disconnect on your phone: Similarly, in your phone's Bluetooth settings, if the headphones appear to be connected, select Disconnect or Unpair.
Consult your Bluetooth headset instruction manual to find a way to reset the headset to factory settings. Different headset brands and models may reset differently, but usually include one of the following:
Press and hold the power button: Some earphones can be reset by pressing and holding the power button for more than 5 seconds.
Use the reset hole: Some earphones have a small hole as a reset button, use a small object (such as a clip) to press and hold the button to reset.
Press multiple buttons at the same time: Some headphones may require you to press and hold multiple buttons at the same time to complete the reset.
Once the headphones are reset, all previous pairing information will be cleared.
After resetting the headphones, re-pair them with your phone
Make sure the headphones are in pairing mode: Normally, press and hold the power button or pairing button of the earbuds until the indicator flashes or you hear an audible prompt for pairing mode.
Open your phone's Bluetooth settings: Find the Bluetooth settings in your phone's settings menu and turn on the Bluetooth function.
Select your headphones to pair: Find the name of your earphone in the list of available devices displayed on your phone, tap it to start the pairing process. Follow the prompts to complete the pairing.
If your phone supports it, you can set your headset to be the device you connect to first in the Bluetooth settings. This allows you to connect to your phone first across multiple devices.
When the headphones are not in use, power off the headphones to avoid automatically connecting to other devices.
When using Bluetooth headphones in public, watch for other devices around you trying to connect to your headphones.
If there is still a problem with the earbuds after following the above steps, it is recommended to contact the manufacturer of the earbuds for more professional technical support.